I am a skeptic by nature, but I am not a cynic.
It is difficult to persuade me; but once I am persuaded, it is difficult to un-persuade me.
Once I am convinced of something–even if it ultimately proves to be wrong–I tend to hold onto that belief until it draws its last breath in my life.
This is why I say I am not a cynic. I am an optimist. I tend to keep believing in something long after it stops working. This is something that can be a virtue but can also work against me.